Kneading and mixing machine



Jnvn'lor 21 June 1927 F. KEMPTl-:R

KNEADING AND MIXING MACHINE Patented June21c1927.

UNITED STATES? 1,632,975 PATENT oFF-ICE. 4

. raITz lILaMrTna or STUTTGART, GERMANY. i

KNEADING AND MIXING MACHINE.

Application led August 25, 1924, Serial No. 734,026, and in ,Germany June 13, 1924.

My invention relates to kneading and mixing machines'andmore especially to ma.-

chines of the kind described in which the kneader'is'horizontal,v that is, in which its f' arms rotate on horizontal shafts. It is an object of my invention to overcome certain drawbacks of this type of machine by combining a vertical agitator with a normal/ horizontal kneader. Y In horizontal kneading and mixing machines plastic and tenaclous substances of any kind may be manufactured. If it 1s desired, however, to dissolve or dilute such substances it I will be found that this is feasible to a limited extent only because the horizontal kneader operates satisfactorily only so long as the level of the liquid in the trough is not much' above its range. The higher the liquid level is raised, the less will be the influence of the kneader on the liquid above it.

In order to effect considerable dilution it was necessary heretofore to sub'ect the slightly diluted or undiluted material from the kneading and mixing machine to further treatment in a separate agitator the object of which was merely to dilute the material. This method obviously involves loss of time increased labour and other difficulties partlcularly in they case of dilution in vola-l tile solvents.

It might appear that the difficulty could be overcome by providing an additional hory ing to my invention by arranging a vertical agltator above the normal horizontal kneader. The trough is extended correspondingl above said horizontal kneader and the sha t of the agitator is passed through, and'preferably carried in' a bearing of the lidy of the trough. The object of the agitator merely to dilute the material in the trough above said horizontal kneader.

The agitator is readily removed by removbox.

ing or raising the lid of the trough or its shaft may be arranged to be raised and lowered. In either case, the agitator not 9 in the way during the kneading or mixing operation. Inthe case ofvolatile solvents, it is possible to perform the kneading and 4mixing operation and the subsequent agitaand forming part thereof a kneading machine embodying my invention isillustrated in vertical section.

In a trou a which may be provided with a cooling ]acket or thel like b,- horizontal shafts o and d are arranged to which are secured mixing and kneading arms c6 and d respectively which rotate past cylindrical faces formed in the bottom of the trough and are operated by means well known 1n thelart and therefore not illustrated in detai A vertical shaft carrying agitating blades f extends into the trough a from above.l

Preferably the shaft e is supported in a bearing e in the lid g of the trough. The bearing may be provided with a stuffing A pulley 7c may be secured on the free end of the shaft a, but any other means may be provided for imparting rotation to the shaft e, for instanoebevel gears. -The drive for the shaft e malyl7 also be soconstructed as to comprise t e hinge` pin z' of the lid g, so that it is possible'to open the lid without interfering'A with' the drive `of the shaft'. For the same purpose, the shaft may be adapted to be displaced axially in its bearing e together with the pulley or other driving means, as indicated in dottedlinesor ada ted to bed displaced while the pulley or ot er driving means remain statlonary.

y When the' machine is being' charged with 'material and whilel the mixing or vkneading ,apparatus'at the bottom of the trough a is in operation, the shaft e may also be raised,

as shown in dotted lines, so that,the blades f .are not struckv by the. material which is charged at the doors h. It is also possible to provide baies m at the lower face of the lid gwhich may 'be annular as shown or I may provide a lurality of independent baf- 'A fles. Instead o providing charging doors h,

or in addition to these, I may provide a charging door or charging doors n in the vertical wall of the trough. All these doors are so constructed as to close tightly.'

At'the bottom of the trough drains o may be provided.

I wish it to be understood that I do not desire to be limited to the exact details of construction shown and described, for obvious modifications will occur to a person skilled in the art.

I claim:

' 1. Kneading machine comprising a trough, a kneader in said trough and a rotary agitator mounted in Said trough for axial displacement above said kneader.

2. Kneading machine comprisinga trough, a lid on said trough, a ,charging hole in .a lid on said trough with a charginghole porvided in said lid, a kneader in said trough, an agitator mounted in said trough 4` above said kneader for rotary and axial displacement and a flange'dependng from said lid to protect said agitator, when in raised position, from contact with matter introduced through said hole.

ture.

FRITZ KEMPTER.

In testimony .whereof I aiix my ,signa- 

